Proprietary HTML comment tag in Internet Explorer of both Windows and Mac

Rarely heard of it from any of the popular web design / development sites (blogs, forums, info portals and so forth), there’s actually a small implementation of the tag <comment> in both Internet Explorer Windows and Internet Explorer Mac.

You are <comment>not</comment> browsing on Internet Explorer.

You are browsing on Internet Explorer.

No more than a spice to amuse though, because rarely any hacking situations require the differentiation of both IE from other browsers.